Sash lock



NoModel.) 0. K. GARDNER.

SASH LOCK, LIFT, AND BALANCE.

No. 522,889. Patented July 10, 1894.

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U ITED STATES PATENT ()FFICE.

ONSLOW K. GARDNER, OF PITTSBURG, PENNSYLVANIA.

SASH LOCK, LIFT, AND BALANCE.

$PECIFICATION forming part of Letters Patent No. 522,889, dated July 10,1894. Application filed January 81, 1894. Serial No. 498,580. (Nomodel.)

.To (ZZZ whom it may concern:

Be it known that I, ONSLOW K. GARDNER, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and ImprovedSash-Lock, of which the following is a full and exact description.

My invention is an improvement in sash locks adapted to operate inconnection with a rack attached to the side of a window frame,

The invention is embodied in the special construction of the sash lockas herein described.

In the accompanying drawings Figure 1 is a perspective view of a windowframe and sashes showing my invention applied to the lower sash. Fig. 2is a face View of a portion of such frame and the lower sash, with myinvention applied (enlarged). Fig. 3 is a view similar to Fig. 2, savethat the face plate of the sash lock is removed.

The lock is composed of a slotted case or easing b, a toothed wheel G,and a vertically slidable pawl I. The Wheel, G, is mounted in said caseon a transverse axle, c, and gears with the rack D. A coiled spring IIis attached at one end to such axle, c, and at the other to the case atd. The pawl I has a vertical shank, and curves over an upper portion ofthe wheel G, its ends being. provided with a tooth, e, for engaging thesameas shown. Its shank has a lateral flange 9, that serves as afinger-lift and projects through a slot in the case b. The latterisprovided with a fixed lateral flange on lip h, opposite the finger-liftof the pawl. A spiral spring is, is arranged in the case b, to pressdownward on the pawl I, and hold it normally engaged with the wheel G.By resting a forefinger on the liph, and pressing the adjacent thumbupward against the lifter g, the pawl I may be easily slid upward andthus disengaged from the wheel G, which. unlocks the sash so that it maybe moved up or down, as the case may be, either manually or by the forceof the coiled spring II. It is apparent that upon releasing the pawl Ifrom pressure it will instantly re-engage the wheel G. r

In some cases the spring, k may be omitted and the pawl I allowed toengage the wheel G, by the effect of gravity. The form and arrangementof the pawl are necessary to this operation and the form also enables itto occupy the least space practicable.

What I claim is As theimprovementhereinbefore described, the sash-lockconsisting of the laterally-slotted case, a toothed wheel journaledtherein, and the toothed locking pawl, projecting through said case andadapted to slide bodily, vertically, and also curved corresponding tosaid wheel, over which it extends as shown, and a spiral spring arrangedto bear upon the horizontal portion or shank of the pawl, as shown anddescribed.

ONSLOW K. GARDNER. Witnesses:

S. M. MILLER, J. W. MILLER.

